《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登

“经木质素磺酸盐处理过的粉质砂土的侵蚀速率的评估”

作者：Buddhism Inerrant; Ruska Athukorala; and Jayan Vinod

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，2013年5月，139卷第5期，701–714页

关键词：侵蚀速率；粉质砂土；化学稳定性；木质素磺酸盐

摘要：本文介绍了一个基于能量守恒定律获取一种粉质砂土侵蚀速率的理论模型。当颗粒间的连接在作用于土颗粒的流体压力下破坏时认为侵蚀开始。之后这些分离的颗粒在侵蚀液的流动下悬浮和运移。可进一步假定一旦颗粒完全悬浮，并且已达到流动速度，就不会产生再次沉积。由于经过木质素磺酸盐（LS）的处理，土颗粒的稳定性表现为破坏颗粒间连接所需应变能的增加。该研究基于剪切应力-应变特性，平均流速，平均粒径和颗粒的堆积排列提出了方程。本文提出的模型以侵蚀速率和水力剪切应力关系的形式给出。该模型对一系列的室内侵蚀试验有效，并采用了用于内部裂缝侵蚀过程模拟的装置（PSAICE）对粉质砂土在不同的LS百分比进行了试验。模型的计算结果与试验观测基本吻合。

Estimating the Rate of Erosion of Silty Sand Treated with Lignosulfonate

Authors: Buddhima Indraratna; Rasika Athukorala; and Jayan Vinod

Journal: Journal of Geotechnical and Geoenvironmental Engineering, Volume 139, Issue 5 (May 2013), 701–714

Key words: Erosion rate, Silty sand, Chemical stabilization, Lignosulfonate

Abstract: This paper describes a theoretical model to capture the rate of erosion of silty sand based on the principle of conservation of energy. Erosion is considered to begin when the interparticle bonds between grains are broken by hydrodynamic stresses exerted on the soil particles. These detached particles are then suspended and transported by the flow of eroding fluid. It is further assumed that once the particles are fully suspended and have reached the flow velocity, resettlement does not take place. Stabilization of soil particles because of lignosulfonate (LS) treatment is represented by the increased strain energy required to break the antiparticles bonds. The equation proposed in this study is based on the shear stress-strain characteristics, mean flow velocity, mean particle diameter, and the packing arrangement of particles. The result of the proposed study is presented in the form of erosion rate versus the hydraulic shear stress. The model is validated with a series of laboratory erosion tests using the Process Simulation Apparatus for Internal Crack Erosion (PSAICE) for different percentages of LS. The model results are in good agreement with the experimental observations.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000766